Re having to think all the time: a good start is to develop a habit of rejecting certainty about judgments and beliefs that you haven’t examined sufficiently (that is, if your intuition shouts at you that something is quite clear, but you haven’t thought about that for a few minutes, ignore that intuition unless you have a reliable reason to not ignore it in that case). If you don’t have stamina or incentives to examine such beliefs/judgments in more detail, that’s all right, as long as you remain correspondingly uncertain, and realize that the decisions you make might be suboptimal for that reason (which should suitably adjust your incentives for thinking harder, depending on the importance of the decisions).
Re having to think all the time: a good start is to develop a habit of rejecting certainty about judgments and beliefs that you haven’t examined sufficiently (that is, if your intuition shouts at you that something is quite clear, but you haven’t thought about that for a few minutes, ignore that intuition unless you have a reliable reason to not ignore it in that case). If you don’t have stamina or incentives to examine such beliefs/judgments in more detail, that’s all right, as long as you remain correspondingly uncertain, and realize that the decisions you make might be suboptimal for that reason (which should suitably adjust your incentives for thinking harder, depending on the importance of the decisions).